Disk Partition Table (Fixed disk boot record)

      Offset	    Represents:  (see format below)

	01BE	    Partition 1 data table  (16 bytes)
	01CE	    Partition 2 data table  (16 bytes)
	01DE	    Partition 3 data table  (16 bytes)
	01EE	    Partition 4 data table  (16 bytes)
	01FE	    Signature  (hex 55 AA, 2 bytes)

	Offset from beginning of partition data shown above:

     Offset Size		Description

	00   byte   boot indicator
	01   byte   beginning sector head number
	02   byte   beginning sector (2 high bits of cylinder #)
	03   byte   beginning cylinder# (low order bits of cylinder #)
	04   byte   system indicator
	05   byte   ending sector head number
	06   byte   ending sector (2 high bits of cylinder #)
	07   byte   ending cylinder# (low order bits of cylinder #)
	08   dword  number of sectors preceding the partition
	0B   dword  number of sectors in the partition


	Boot indicator (BYTE)

	00  - non-bootable partition
	80  - bootable partition (one partition only)


	System Indicator (BYTE)

	00 - unknown operating system
	01 - DOS with 12 bit FAT, 16 bit sector number
	02 - XENIX
	04 - DOS with 16 bit FAT, 16 bit sector number
	05 - DOS Extended partition (DOS 3.3+)
	06 - DOS 4.0 (Compaq 3.31), 32 bit sector number
	51 - Ontrack extended partition
	64 - Novell
	75 - PCIX
	DB - CP/M
	FF - BBT


	Signature

	Hex 55AA marks the end of valid boot sector.	 This is also
	required in each of the partition boot records.


	Sector/Cylinder

	2 bytes are combined to a word similar to INT 13:

	│7│6│5│4│3│2│1│0│ 1st byte  (sector)
	 │ │ └─┴─┴─┴─┴─┴── Sector offset within cylinder
	 └─┴───────────── High order bits of cylinder #

	│7│6│5│4│3│2│1│0│ 2nd byte  (cylinder)
	 └─┴─┴─┴─┴─┴─┴───── Low order bits of cylinder #


	- all partitions begin on sector 1 head 0, except the first
	  partition which follows the disk's master boot record and begins
	  in sector 2
	- some of this information may vary with some variants of DOS 3.2
	  and DOS 3.3 that use their own sectoring scheme for large disks

	- see  INT 21,32  Disk Partition Table